If you want to do something different like the USB case below, you need to be
sure that the section holding the PCB board is right size and not too small or too wide so
that it is difficult to use on a computer with multiple ports next to each other.
For this reason it is best to start with a sketch of the length and width of the main section
of the USB case (36 x 20mm) then add on the rest of your design. Then extrude it and use a
primitive box shape to get the cutting box exactly the right size so the pcb board fits inside.
The outer box size below is for the
main part of the case which holds the
PCB – it is the optimum size, as
narrow as small as possible whilst big
enough to be strong
The cutting box size must always be
used to cut the correct sized hole
for the PCB board and for the top to
fit over the end of the USB.
Outer box size
36mm long
20mm wide
10mm high
Cutting box size
34mm long
14mm wide
4.6mm high
Start with a sketch of basic USB case size then
add to your sketch and trim ready to extrude
USB Top
Outer box size
20mm long
20mm wide
10mm high
Cutting box size
15mm long
12.5mm wide
4.65mm high
Extrude the design to height of main case – 10mm
Diane Burton, STEM Outreach. D.S.Burton@warwick.ac.uk
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